It's going to be personal preference and I think a wet test is necessary. I've sat in both. Generally speaking, I like the Cantabria better. I do like the massage sequencer. My two thoughts are this. If you need to actually accommodate 7 adults, the Prism will do so better than the Cantabria. Also, my wife and I fit better in the Prism lounge. I'm 5'8" and she is 5' 5" and we both floated in the Cantabria. If we didn't float, then my preference would be the Cantabria without question.